Hey, My wife wants to come to the iphone side... I have a family plan which she is not yet included in. She wants to get an iphone on att, keep her phone number, and get on my family plan. what is the easiest way to do this? we were going to try to get the phone for $150... from walmart? should i go to walmart in person? can do it online? how to ensure the number porting and family plan thing go correctly? thanks, r.